Attachment for drill-presses



A. F. ZEGA.

ATTACHMENT FOR DRILL PRESSES..

APPLICATION FILED NOV- 8, 1918- Patented Feb. 22, 1921.

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ATTACHMENT .FOR DRILL PRESSES. APPLICATION men NOV. 8, 1918.

1,369,31 3. Patented Feb. 22, 1921.

3 SHEETS-SHEET 3.

IN l/EN TOR Azziwyl'Zggu 8) A7 anon/ms um'rao s'rarlazs ANTHONY I. ZEGA,OF NEWARK, NEW JERSEY.

ATTACHMENT FOR DRILL-FREEBIES.

Specification of Letters Patent.

Patented Feb. 22, 1921.

Application filed November 8, 1918. Serial No. 281,587.

To all whom it may concern:

Be it known that I, ANTHONY F. ZEGA, a

. citizen of Russian Poland, and a resident of Newark, county of Essex,and State of New Jersey, have invented certain new and usefulImprovements in Attachments for Drill-Presses, of which the following isa specification.

My invention relates to attachments for drill presses, enabling theconvenient performance of close work without interference with thenormal use of the drill press for rough work.

Among the objects of the invention is the provision of a verticallyadjustable work table provided with convenient means of adjustment andwith shock absorbing means for protecting the parts from injury when stoped at their limit of motion.

nother object of the invention consists in the provision of a drill ortool guide which may be located close to the work and which does notinterfere with the use of the ordinary drill press table and which cannot be made use of when the latter. is in osition for use.

other object of the invention consists in the arrangement and locationof the various control and adjustment devices in a novel manner, makinthem readily accessible and at the same/tame out of the way of workmenusing the machine.

The invention further consists in the improvement of apparatus of thecharacter referred to in a variety of particulars, as will appear fromthe following description and be pointed out in my claims.

With the foregoing and related objects in View, my invention consists inthe parts, features of construction and combinations of elements hereindescribed and claimed.

In the accompanying drawings, Figure 1 is a side view of a drill pressequipped with my improved attachment. Fig. 2 is a front view of theapparatus shown in Fig. 1, and Fig. 3 is a horizontal sectional viewtaken on theline 33, Fig. 1.

The drill press may be of any usual or desired form. As illustrated, ithas a base.

10 and. an upper or frame portion 11 with a vertically djustable drillspindle 12 driven from a belt pulley 13, over which the belt 14 passes.The usual system of change speed pulleys 15 and 16 isconnected by thebelt 17 and driven from fast and loose pulleys 18, 18'. Various otherforms of drive,

be used. A weight 20 is provi ed for raismg the drill shaft 12, andmeans for ma nipulation of such shaft are provided, such as a rack 21and a gear 22 and handle 23. These control members are preferablylocated on an adjustable arm 24 which may be ad usted up and down on thedrill press frame, as by bemg slidably mounted on the sl1de 25 andlocked in place by bolts 26.

The dr1ll press table for ordinary or rough work 1s designated bynumeral 27 and is mounted on the drill press frame 11 so that it may beturned in a horizontal plane. In the form shown it is split and the twoparts bolted together by bolts 28, provldlng between them a journalopening in which the horizontal ortion of the frame 11 1s received. Thetab e 27 gets its entire support from its mounting on the frame 11. Thetable for close work is located lower down than the table 27 and isdesignated by numeral 30. Such table preferably is provided with worklocating bars 31 and 32 preferably arranged at right angles to oneanother and which may be received in slots provided for that purpose, orotherwlse secured in place. Undercut slots for receivlng bolts forholding the work may be arranged as desired on the work table, as,

for example, slots 33, 34 may be placed along two of the sides of thetable and an lntersecting slot 35 may extend diagonally across thetable.

The table 30 is mounted for rotation upon, the slide member 36 and maybe secured in adjustable position. as by means of bolts 37 ,whose headsrun in the circular undercut groove 38 in the slide member 36. Therotativeposition of the table may be read off from a scale 39, and anextra screw 40 may also be provided, in addition to the bolts 37, forlocking the table 30 in desired rotative position. The slide member 36is mounted to slide from side to side on a second slide member 41 and isactuated by a screw 42. Having the crank or handle 43 at the side of themachine and therefore out of the way of the operator, who usually standsin front of the machine, the position of slide member 36 is read fromthe scale 44 and vernier 45, which preferably face upwardly at an angle,as shown in Fig. 1, for convenience in reading. The second slide member41 moves in and out on a bracket 47 being operated by a screw 48.

This screw is also turned by a handle at the side of the machine anddesignated by reference numeral 49. Its shaft 50 carries a preferablyspiral gear 51 meshing with. a cooperating gear 52 on the screw shaft48. Its position may be read from the scale 53 on the bracket 47 andernier 54 on the slide member. (See Fig. 3.)

The bracket 47 is mounted for vertical ad justment on the machine base10, being movable up and down on the slide 55. Its upward movement islimited by suitable means, as a late or stop 56, which, as shown, isbolte between the base member 10 and the upper frame portion 11 andextends into the path of movement of the bracket 47.

The handle 58 for raising and lowering the table is also located at theside of or beneath the machine adjacent to the handles 43 and 49. Itturns a shaft 59, imparting rotation through gears 60 and 61 to a screw62 which turns in an internally threaded sleeve 63 splined forlongitudinal movement in a socket member 64 secured in the machine base10. The sleeve 63 is supported by a compression'spring 65. The bracket47 may be locked in place on the slide 55'by any suitable means, such aslooking bolts 66.

A drill or tool guide is provided which can be moved out of the waywhendesired, or readily secured in accurate guiding position for the drillor other tool. Means are provided whereby this guide can be locatedclose down to the table 30 when the latter is raised to its highestposition, affordin an accurate guide close to the work. S uch idecomprises an arm 68 ivoted on the rame 11.at one side thereo as shown at69, and provided with a groove or recess 70 for the reception of bolt71, which is likewise pivoted to the other side of the frame portion 11,as shown in Fi 3 at 72. A nut 71 runs on the bolt 71. he outer end ofthe arm 68 is bent or turned downwardly, preferabl about as shown-inFig. 1, and is provide with a guide opening 73 for guiding the tool andpreferably formed with a hardened bushing 74.

The work table 27 is provided on one side, in the neighborhood where itis journaled on the frame portion 11, with a cut-out 75 to make room forthe reception ,of the lower portion of the arm 68 when such arm and thetable occupy the position shown in Fig. 1.

The opleration of the apparatus in accordance wit my invention is asfollows:

When the drill press is needed for ordinary rough work,'the table 27 isswung to the position shown in full lines in Fig. 1 and in dotted linesin Fig. 3, the arm 68 having first been freed by unscrewing nut 71'- andthen turned to the position also shown in full lines in Fig. 1 and indotted lines in Fig. 3. It will thus be seen that the tool guiding meansmust be swung out of the way before the ordinary work table 27 can beput into use, and that it can not be harmed by the rough treatment towhich it might be put if it were possible to make use of it at the sametime the work table 27 is being made use of for ordinary rough drillpress work. \Vhen the apparatus is to be used for closer work the table27 is swung to the position shown in full lines in Fig. 3 and turningthe table on its pivot or by manipulation of handles 43 and 49, theextent of the movement bein readily read off from the scales andvermers, and the bracket 47 and the table 30 carried thereon may also bemade to move up and down by manipulation of the handle 58. No harm tothe apparatus can result from turning the handle 58 too far ortoorapidly, since any shock of the bracket 47 against the stop 56 is takenup by the spring 65 serving as a shock absorbing means for such purpose.

It will be seen that all the various control means are located closetogether and beneath or at one side of the apparatus, where they arereadily accessible to the left hand of the' operator, who at the sametime may have his right hand free for other work, and that numerousother advantages are secured, as above referred to.

It is to be understood that changes and modifications from the apparatusshown for the purpose of illustration, may be resorted to within thescope of. my claims.

I claim:

1. In apparatus of the class described, a machine frame, a bracketslidable up and down thereon and carrying a work table, a screw forraising and lowering said bracket and table, a compression spring suporting said screw, and positive stop means or limiting the upwardmovement of the table.

2. In apparatus of the class described, a machine frame, a bracketcarrying a work table andmovab'le up and down on said frame, a screw forraising and lowering the table, a socket piece in the machine frame,

ANTHONY F. ZEGA.

